anyone know how to make one...i am tired of leaving my lights on...

 

do what im doing, get a small speaker, find the male connector in your fuse box that gets power only when your lights are on, then find something else thats only on when the car is in motion, connect the neg. to the light connector and the ground to the other thing thats only on when the cars running, so now whenever you turn your car off with the lights on it'll make noise

 

like what?

 

check out a manual, it'll have something i can't think of anything off hand at the moment though